Core for use in wall-molds.



PATENTED DBC. 8, 1903.

A. T. BOISE. CORE FOR USE IN WALL MOLDS.

APPLIUATION FILED NOV. l, 1902.

N0 MODEL.

u., wnswmmm o r 4UNITED @Tartes Patented December 8,

` PATENT Genion.

ALVARADO T. BOISF., OF BOYNE, MICHIGAN.

cons For: use IN WALL-Motos.

SPECIFICATION forming part of Letters Patent N o.l 746,445,' da,ted December 8, 1203.

Application filed November 1, 1902- Serial No. 129,674. (Nomodel.) l

.To all whom it may concern:

Beit known that I, ALVARADO T. Boisn, a citizen ofthe United States, anda resident of Boyne city, in the county of Charlevoix and State of Michigan, have invented a new and Improved Core for Use in Wall-Molds, ot' which the following is a full, clear, and exact description.

This invention relates to an apparatus for facilitating the building of Walls from concrete, cement, or other plastic material. The invention is especially useful in house-building, although it is obvious that it could be employed to much advantage in other connections.

The invention resides particularly in animproved collapsible core around Which the plastic material is molded, so as to form cavities in the Walls when the cores are removed. These cores comprise, brieliy stated, a relatively rigid frame or body and a coutractible shell formed of an integral sheet of liexible material curved around the frame or body and having its ends overlapped or otherwise engaged, the frame or body having means for holding it in proper connection With the frame.

This specification is an exact description of one example of my invention, While the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forminga part of this specification,

in which similar characters of reference indi- 'cate corresponding parts in all the views. 35-

-a corner therein, thus illustrating the mold adapted for corner-Work, although it `is apparent that long stretches of Wall may be formed in a straight line or at any desired 'angle or curve by merely varying the form of the mold.

The mold comprises side Walls 10, which may be made up of Wooden planks, if so desired, and end Walls 11. On the ends of the Side Walls lO beads 12 are formed, these beads engaging the end walls to hold them in place.

lAt'the cornersone of the side walls may formed with a bead,- such as the bead 14 Fig; 1, to overlap the meeting side wall, tl being the preferred construction atthe oui angle of the corner, and at the. inner ang the. side walls may be made to abut togeth with a miter-joint, as shown. The inner fatI of the side Walls 1 0 are vformed with ribs thereon, these ribs being of any desired z rangement. For example, they' may be t ranged as shown in Fig. l, and said ribs ser When the plastic material is moldedagail: them to give the Wall the form of separa blocks cemented together, thus representii ordinary masonry.

The side walls are held in place by tl clamps illustrated in Fig. 1. These clam are of inverted-'U shape, comprising si( arms 16,` a crossing top piecel'', and a tie-rr 18, arranged slightly below the crossing t( piece. The clamps are arranged to stradd the mold, engaging the outer sides of the r spective side Walls, and are drawn forcib against them by the tie-rod 18. These clam] are readily removable by relaxing the stra on the rods 18.

For the purpose of forming cavities in tl wall, thus reducing the amount of materi` necessary to build it Without reducing tl thickness of the wall, I provide the cores illu trated in Figs. 1, 2, 3, and 4. These com each comprise a contractible and preferftb cylindrical outer shell 19. Within this she is fitted a relatively rigid frame comprisin circular end bands 20, connecting-pieces 2 extending between them, and the hooks 2 formed on the upper ends of the connectim pieces 2l. This frame when placed in tl shell 19, with its hooks 22 engaged with tl upper end of the shell, will hold the she rigid; but when the frame is withdrawn tl shell may be contracted or reduced in dian eter for a purpose which will fully appea hereinafter. A cap 23 (shown best in Fig. l. is adapted to be placed over the end ofthe co1 to prevent the plastic material from enteriu the same.

In the use of the invention the foundatio of the Wall is laid, and the mold is placed o this foundation in a manner essentially th same as that shown in Fig. 1. The cores ai placed in the mold at the desired distant apart, and then vthe mold is filled with the plastic material of which the'wall is to be formed. This is allowed to set, after which the core-frames are Withdrawn, land the contractible shells are then loosened from the wall and lifted out of the core-holes. Then the clamps for the Walls of the mold are With drawn and the several end and side walls are raisedA above the section of the wall just formed, and the mold is again assembled. This operation is continued both in a vertical and in a horizontal direction until the complete wall has been formed.

Various changes in the form, proportions, and minor details of, my invention may be resorted to at will without departing from the spirit andscope thereof. Hence I consider myself entitled to all such variations as may lie within the intent of my claims.

Having vthus described my invention, I claim as new and desire to secure by Letters Patent- 1. A core for the purpose specied, com- 2. A core for. the purpose specified, com'- prising a relatively rigidf'rame having hooks at one end, a contractibleshell inclosing the body and having thehooks engaged therewith, and a cap adapted removably to fit in the upper end of the core. y

3. A core for the purpose specified, comprising a relatively rigid frame formed of end bands and longitudinal connecting-pieces terminating at'one end in hooks, and a contractible shell inclosing the frame and engaged by said hooks.

In testimony whereof I have signed my naine to this specification in the presence of two subscribing Witnesses.

Witnesses:

LEONARD F. KNovvLEs, E. A. RUEGSEGGER.

ALVARADO T. BOISE. 

